y英语语法修改
题目
y英语语法修改
People would like to do some shopping in the city,for there are many goods for them to choose; parents want to send their children in the city,for the educational facilities in the city are more advanced; workers hope to work in the city,for they have more opportunities and can earn more money.the traffic in cities is more convenient.You can go somewhere by plane、subway、bus or taxi.Yet people still go the countryside to enjoy the rural life if they have time to enjoy the fresh air.
看看有没有语病,改的检点容易一点.
答案
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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